Fuse plug and socket



March 15, 1932. HART 1349 744 FUSE PLUG AND SOCKET Filed Dec. 30, 1929 2 sheets sheet 1 T; Inventor 71 y 47%; K 257% A tiorney March 15, 1932. A. K. HART 1,849,744

FUSE PLUG AND SOCKET Fil ed Dec. 30, 1929 2 Sheets-Sheet 2 Mmmwwmm I v I II [T 111- ':::::I Inventor 7 j/Zerf Kim Patented Mar. 15, 1932 ITED ALBERT K. HART, OF ST. LOUIS, MISSOURI FUSE PLUG AND SOCKET Application filed December 30, 1929. Serial No. 417,486.

This invention appertains to new and'useful improvements in fusible elements and sockets therefor, and more particularly to a fuse plug and socket which has as its principal object, the provision of means, whereby the liability of being shocked when mounting or demounting the plug is almost impossible.

Another important object of the invention is to provide improvements in fuse plugs and 1c sockets, which while possessing considerably more merit over conventional types, does not increase the cost thereof.

These and numerous other importantpbjects and advantages of the invention will to become more apparent to the reader after considering the invention as described and claimed hereinafter.

In the drawings Figure 1 represents a fragmentary section- 2o a1 view through the socket constructed with the novel plug engaged therein.

Fig. 2 represents a top plan view of the plug.

Fig. 3 represents View of the panel with theplug removed.

Fig. 4 represents a bottom plan view of the conductor supporting strip.

Fig. 5 represents a sectional view through the fuse plug.

Fig. 6 represents a cross sectional view thru the fuse socket panel, showing a fuse plug engaged therewith.

Fig. 7 represents a fragmentary bottom plan view in section, showing the legs of the plugs in conductor engaged position.

Fig. 8 represents a fragmentary edge elevation of the socket panel with a fuse plug engaged therewith.

Referring to the drawings wherein like numerals designate like parts, it can be seen that the fuse socket panel is constructed of top strip 5, a bottom strip 6, and an intermediate or conductor supporting strip 7 each being of some suitable dielectric material.

Each socket construction consists in providing the top strip 5 with a circular opening 8 projecting inwardly into this opening 8 and in spaced relation with respect thereto, is the protuberance 9 on the bottom strip 6. 5) The intermediate strip 7 is provided with a fragmentary top plan an opening 10 concentric with respect to the cylindrical shaped protuberance 9.

I, posed projections 15 protruding into the opening 10, one of the same being ofiset toward one side of one of the recesses 14, while the other is offset in the oppositedirection from the other recess 14, as in the manner as clearly shown in Fig. 3.

Extending up from one of the projections 15 is the contact strip 16, secured by a suitable means 17 to the binding post or connector 18. The plug l3' includes the di-elec- 7 tric shell 12, aforementioned, which is flanged at its open end as at 19. A rim 20 engages over the flange 19 for supporting the transparent pane 21. A pair of legs 2222 protrude from the closed end of the shell and are connected at their inner ends by the fusible elements 23.

The outer free ends of the legs 22-22 are bent laterally in opposite directions as at 24. As is clearly apparent, these laterally bent so portions 24 are adapted to be engaged through the recesses 1414 for disposition in the opening 10. By rotating the plug, the portions 24 of the legs 22 may be swung from the position shown in Fig. 4 to the position shown in Fig. 7 thus contacting the legs 22 with the contact strip 16 and closing the circuit to be protected.

It can thus be seen that it is practically impossible to obtain a shock in manipulating the fuse plug to a circuit closed position. Furthermore, a socket panel constructed in accordance with the foregoing specification, can be manufactured much cheaper than the individual sockets now sold on the market.

It will be noted in Figures 1, 2 and 6 that the rim 20 is provided with an car 25 which will permit the sealing of the fuse in a position with the lateral extensions 24'24: disengaged from the contact members 16-16.

The foregoing specification sets forth the invention in detail, yet it is to be understood that changes in the shape, size, materials, may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having thus described my invention, what Lclaim' as new is In combination, a ture, said socket structure compris ngiatop section, a bottom section, an intermediate section, said top section being provided with an opening therethrough, said intermediate section being provided with an opening 'of larger circumference, a protuberance extending from the bottom section throughi'fthe aforementioned openings spaced from the walls of said openings, contact elements secured to the intermediate section and abutting parts of the outer side wall of said openings whereby said contact elements are located under parts of the top section, said plug being provided with laterally disposed contact legs for disposition in the opening of the intermediate section, for engaging the said contact elements, and stop projections extended inwardly from the side wall of the opening in the intermediate section and abutting ends of the contact elements and acting as stops to limit the movement of the saidlegs of the plug.

In testimony whereof I affix m signature.

ALBERT i? RT.

neee ee fuse plug, a socliet struc 

